PCNA and hydrops fetalis: The percentage of available time spent on the grassy range by hens did not correlate with their expression of PCNA mRNA in the HF as a whole [F(1, 50.0) = 2.95, p = 0.092], but there was an interaction with rostrocaudal subregion [F(1, 46.2) = 5.10, p = 0.029, Figure 2A].